The breadcrumb trail is the navigation aid that shows users the path they have taken to get to a web page located within a website. This graphical control element helps and allows<span> users to keep track of their locations within programs, documents, or websites.
</span><span>Example: a user can see where the current page is in relation to the Web site's hierarchy.</span>
Answer:
An extranet is a private network that uses Internet technology and the public telecommunication system to securely share part of a business's information or operations with suppliers, vendors, partners, customers, or other businesses.
I would go with a funnel cloud on this one. It is the most common sign although it does not guarantee a tornado. Most tornadoes that reach the ground do expand from funnel clouds, but a condensation funnel cloud formation is not absolutely necessary for a tornado to form.